connect by and recursive with (part 2)

According to the docThe subquery_factoring_clause now supports recursive subquery
factoring (recursive WITH), which lets you query hierarchical data.
This feature is more powerful than CONNECT BY in that it
provides depth-first search and breadth-first search, and supports
multiple recursive branches. A new search_clause and cycle_clause
let you specify an ordering for the rows and mark cycles in the
recursion

As written there and there, recursive with has more capabilities. It is also ANSI and implemented in DB2, MS SQL Server. CONNECT BY is an Oracle oddity. But does recursive with perfoms as well as connect by?

Create a big emp

create table big_emp as
with t(empno,mgr) as
(select 1, null from dual
union all
select empno+1,trunc(dbms_random.value(1+empno/10,empno))
from t
where empno<100000)
select * from t